/Engine/Source/Runtime/Engine/Classes/Engine/World.h
typedef TMulticastDelegate_FourParams< void, [UWorld](API\Runtime\Engine\Engine\UWorld) *, bool, [FReplacementMap](API\Runtime\Engine\Engine\FWorldDelegates\FReplacementMap) &, [TArray](API\Runtime\Core\Containers\TArray)< [UObject](API\Runtime\CoreUObject\UObject\UObject) * > & > FWorldPostDuplicateEvent